SKIL 2372-01 7.2-Volt Lithium-Ion Power Wrench Compact design makes the wrench easy to handle while working in tight spaces or in areas where regular drill/drivers won't fit Forward and reverse operation allows for assembling or disassembling projects Lithium-ion battery holds a charge for up to 18 months of non-use so it's always ready to go when a project comes up Skil smartcharge system is built in to the charger, providing overcurrent protection and allowing the tool to be stored on the charger indefinitely without damage to the battery Charger is designed for tabletop or wall mounted operation